Safety lock



Aug- 12, 1930. o. FPESCHl 1,772,728

SAFETY LOCK K Filed June 24. 1929 Patented Ang. f I

Application nleafmne 24,

This invention appertains to `attachments,

for door locks and has for onelof its vprimary objects the provision' of novel-#means for Y holding va key in a Vdoor, lock againstyun-` authorizedremoval androtati0n: inan unlocking direction;

Another important object of my invention j isrtheprovision of a` pivotedflockin'g platef carried by the door .adjacent to the keyhole thereof for" swinging movement across the keyhole for preventing y,the``fwithdramral Vof the key `therefrom,lwith novel V means for locking the Vplate in a position against acci- 'dental displacement from'across the keyhole, the'plate carrying a stoppindisposed in the path of the key when the plate is in its oper'.-

ative position, thereby preventing turning movement ofthe keyin onedirection; n

A still Vfurther object ofmyinventionis to provide an improved attachment jfor Ydoor locks of the-above character," which will be .durable and eiicienty infuse, one thatwill be simple and easyto man1'1facture,-:k andy one which can be ,with these and Caei Objects jini-viagra@ invention consists in the novel constructiom arrangement and formation lof partsfasf will o' 1 bek hereinafter 4more* specific'allyf,k described` Y 30v claimed, and illustratedin theaccompanying drawings, in which drawings: y i.

F -'gure 1 is a fragmentarysideelevation of a door equippe'df'withthefdoorj'lockand f having my improved vattachr'nentf'` incorpo-j,

23,5 rated therewith, ,the `door` knob `and shankfor Vthe lock and doory being showninfsection;` FigureQ isaverticalsection through the@` tt h .v o

door Showmg my a ac' men 'Incorpora ed. In,0Prat`10n-ioftheimproved Figure is a fragmentary rear elevationof `thedoolis' locked from theinSidin the S1131 o with the lock and in its operative vposition ;V f

showingy my improved y rated therewith; i

Y x Figure 4fV isa vertieraal-sectionthroughithel` vlock andldoorrtaken onthef'line klro-v4t'ofpFi`g-l' ure l looking in thef direction of fthe. arrows; Figure f5 is a horizontal section through the door ,showing my Qimproveddevice. .in-

,5a.orporated with thetheref; and,k L l ,y

Placed P911 the' mrket'at a) 25 reasonable cost. v l

Y I k1,772,728*

Re'ferringto'the drawingsin detail, wire-re` "in similar reference characters-designate corr` fre'spol'ifdi-ng parts l throughout the vrsevera-l o views, the letter Agenerally, indicates con- Vventionallock forfadoor v l" i The llocklA,"afsfshowngis'ofthe mortisetype I 'and embodies the linner and outer eseutcheon `or face plate 5 and 6. Thesey faceplates are providediwith registering keyhole's Tand 8 ingfavresilient-varm"11" formed onf onef edge thereof and extendingiparallelwith th'low'er n 1faceof1the plateL Theiouter end of theresili' 'ent' army llfcanbe bowed', `outwardly as @at 12, k ,for yspacing#thesame*froxnthefface (of the f `{floorgf as v`will kvbe laten described* In,r accord# which/also registerlwith the keyhole inthe Propilfj' Associated 'Wit'hfthe inner e'scutcl'ieon or i face plate 5f is my improved lock attachment C which comprises a'lat metal plate 1,0.y havx ancewithmyf inventionfthe'inner escu'tc'heon o plate 5l has oe'iedge thereof providedwith a l slotfrlpandl theverticaljwallof the slot `at its y loweri'uend',isfprovided with a notch. 14 and,

said vertical edgecan lbe downwardly inclined for leading'towardsaidfnotch.

The plateicigpiacedontheinsideof the y escutcheon'or inner face plate ,o5 with theoperatinglarmll thereof protruding through the` slot' 13 andtheouter upper corner of the plate v '.10 is pivoted as at l15 to theescutcheonplate n ,y n vfatonefs'i'de of the keyhole'7 therein. The inl-y... gnermupper corner fof; the' plateKVV 'has formedzzg thereon or'secured thereto thellaterally eX'-,A

the keyhole yof,theJlocklproperll .of the keyhole' f( referring to I4fi,'gi1rev1) after i which thearm'll isswungfdownward which stoppinll in thepa'th of the'bightlrof the ment of the keygin a directionlto unlockthe" tending stop fpinql ywhich extends through 'a'ttacimflan;v gcc'A o the eseutcheon' er face plate aof theidor. Jack fmner `with the birht 0f the :key t0 the -lftl ambhmntin'cefpi A will raisetheplate1--acrosS hekey'hole 7 of; 5 Y.

the escutcheon or "face plate 5, disposing thel95 key'therebyfpreventing theturningfmove- 'i i door. Asthearm 11.is moved downwardlysi/ @he same .springs into the'fnotch lfiwhchjj/loo locks theplate in position against accidental movement.y The t in and the plate efec` tively revent witlidrawal of the key from the loc and revent the forcing of the key out of the loc from the outside of the door,

- or theturning of thekey by an unauthorized i When it-is aaa-in desired to unlock the door,

Vit is merely necessary to spring the arm 11 from out of engagement with the upper wall of the notch 14 and swing thearxn up which will move the plate 10 belowthe keyhole 7 and the stop pin 16 from out of the ath 'of e the bight of the Akev. This will al owlthe turning'of the key in the proper direction to y i permit the retractng of the bolt. y

From the yforegoing description it can be i "seen that I have provided anexceptionally' ysimple device which y will effectively (prevent the turning or the removal of a key in the lock by unauthorized persons from the outside of the door. t y t y Changes in details may be made without departing from the spirit or the scope of this inventio l l What I claim as new is:

' The combination with a doorvand a door i lock having an escutcheon plate provided with a keyhole registeringwith the keyhole 3U of the lock proper, of an attachment therefor comprising a 'guard plate viivoted at itsupper o" outer corner to the inner face of the `escutcheen plate, Aastop pincarried by the inner upupper-corner ofthe guard plate disposed 1n 3 rthe keyhole of the lock proper, a laterally `exvtending `manipulating arm formed on the lowerl outercornerfof y, the door plate,y and means for lockngkthe arm against movement y when? the same isfin one of its positions. y t

In testimony whereof I aflix my si ature.

'4"' OLIVER F. PE ont. 

